JP2005296741A - Powder screening device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder screening device which can prevent clogging without using surplus elements or factors to the utmost, and can perform screening with a high efficiency. <P>SOLUTION: The powder screening device has a trommel 10, a driving force generation means generating rotary driving force to rotate the trommel 10, and a driving force transmission means which comprises a disk 17, gears, etc., the disk 17 being entwined with a roller chain 15 connecting the driving force generation means to the trommel to transmit the rotary driving force. A subject matter inside the powder screening device is screened by the rotation of the trommel. The disk 17, which is placed at one end of the longitudinal direction of the trommel 10 and entwined with the roller chain 15, is supported from the underside by the gears of the driving force transmission means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a powder sorting apparatus, and more particularly to a powder sorting apparatus that eliminates clogging and improves sorting efficiency.

  Trommel, which has a conical or cylindrical sieving surface, puts the processed material inside, and rotates the conical or cylindrical sieving surface around the shaft at a low speed for sieving. Since it is extremely deteriorated, it is necessary to take measures to prevent the processed material from clogging the sieve surface.

  As a general countermeasure against clogging, a vibrator that is driven by a motor to give an impact to the trommel, a hammer that reciprocates as the trommel rotates and collides with the trommel, and the like is known. However, in this way, there is only one collision point between the trommel and the vibration means, and the method of giving an impact from that point is good near the collision point but eliminates clogging at the distance. There was a problem that it was difficult. In addition, there is a problem that noise accompanying collision is unavoidable. In addition, collisions between devices can trigger a failure or malfunction of the device for a long time.

In order to avoid such a problem, an example has been reported in which a roller is provided so as to contact the outer peripheral surface of the trommel and this roller is supported by an arm so as to be swingable (see Patent Document 1). Since this method shakes the entire trommel, it can prevent clogging uniformly and has the advantages of low noise. However, it is necessary to newly add a roller and an arm, and there is a problem that the cost increases accordingly. Further, in an actual arrangement, there is not always a space where such a roller is provided on the outer periphery of the trommel.
JP-A-8-299908

  As described above, powder sorting devices such as trommel have a problem that the screening efficiency is extremely reduced if the screen surface is clogged. To prevent this, conventional collision type devices have been used. The measures used were often taken, but this method had a problem that the effect of eliminating clogging was small at a distance from the collision point. In order to solve this problem, an example in which a roller in contact with the outer periphery of the trommel is provided has been reported.

  The present invention solves this problem with a relatively simple configuration, can eliminate clogging without using extra elements and elements as much as possible, and can perform efficient sieving. The realization of

  In order to solve the above-mentioned problem, the invention described in claim 1 of the present invention includes a trommel, a driving force generating means for generating a rotational driving force for rotating the trommel, and the driving force generating means and the trommel. And a driving force transmission means for transmitting a rotational driving force, and in the powder sorting apparatus for sieving the internal object by rotating the trommel, the driving force transmission means is arranged in the longitudinal direction of the trommel. One end is supported from below, and vibration is applied to the trommel when the rotational driving force is transmitted.

  In order to solve the above-mentioned problems, a second aspect of the present invention is the powder sorting apparatus according to the first aspect, wherein the driving force transmitting means winds a roller chain provided at one end of the trommel. And a gear engaged with the roller chain. The gear rotates by the driving force of the driving force generating means to rotate the trommel and to vibrate the trommel. To do.

  In order to solve the above-mentioned problem, the invention according to claim 3 of the present invention is the powder sorting apparatus according to claim 1, wherein the driving force transmitting means includes a gear provided at one end of the trommel, It is composed of a disk around which a roller chain to be fitted with a gear is wound. The disk rotates by the driving force of the driving force generating means to rotate the trommel and to vibrate the trommel. .

  In order to solve the above-mentioned problems, a fourth aspect of the present invention is the powder sorting apparatus according to the first aspect, wherein the driving force transmitting means is a first gear provided at one end of the trommel. And a second gear that engages with the first gear. The second gear rotates by the driving force of the driving force generating means to rotate the trommel and vibrate the trommel. It is characterized by giving.

  In order to solve the above-mentioned problems, according to a fifth aspect of the present invention, in the powder sorting apparatus according to any one of the first to fourth aspects, the rotational axis of the trommel is long with respect to the horizontal direction. It has an inclination in the vertical direction.

  In the invention of claim 1 of the present invention, the driving force transmitting means for transmitting the rotational driving force from the driving force generating means to the trommel supports one end in the longitudinal direction along the rotational axis of the trommel from below, When play or backlash of the driving force transmission means transmits rotation, the trommel is vibrated. Therefore, it is possible to continuously give vibrations to the trommel without using extra elements and elements, thereby eliminating clogging of the trommel.

  In the invention of claim 2 of the present invention, the driving force transmitting means is constituted by a disk around which a roller chain provided at one end of the trommel is wound, and a gear engaged with the roller chain. When the roller chain is pressed by the load of the trommel, a predetermined rattle is generated between the roller portion and the portion between the rollers, so that vibration can be applied to the trommel when the rotation is transmitted. As a result, vibration can be continuously applied to the trommel without using extra elements or elements, and clogging of the trommel can be eliminated.

  In the invention of claim 3 of the present invention, the driving force transmitting means is constituted by a gear provided at one end of the trommel and a disk around which a roller chain fitted to the gear is wound. When the roller chain is pressed by the load of the trommel, a predetermined rattle is generated between the roller portion and the portion between the rollers, so that vibration can be applied to the trommel when the rotation is transmitted. As a result, vibration can be continuously applied to the trommel without using extra elements or elements, and clogging of the trommel can be eliminated.

  In the invention of claim 4 of the present invention, the driving force transmitting means is composed of a first gear provided at one end of the trommel and a second gear engaged with the first gear. Since a gear consisting of a set of gears has a backlash, a predetermined rattle is produced when pressed by a trommel load, and therefore vibration can be applied to the trommel when transmitting rotation. Thereby, vibration can be continuously applied to the trommel without using extra elements or elements, and clogging of the trommel can be eliminated.

  In the invention of claim 5 of the present invention, the rotational axis of the trommel is inclined in the length direction with respect to the horizontal direction. For this reason, the powder to be sorted put into the trommel inlet is sorted by receiving rotation and vibration while automatically moving inside the trommel.

  Hereinafter, the powder sorting apparatus of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view of a trommel sieve surface used in an embodiment of the powder sorting apparatus of the present invention. FIG. 2 is a cross-sectional view of the main part of the present embodiment.

  1 and 2, reference numeral 10 is a trommel, reference numeral 11 is a trommel sieve surface, reference numeral 12 is an opening, reference numeral 14 is a slot, reference numeral 15 is a roller chain, reference numeral 17 is a disk, reference numeral 25 is a rotation direction of the trommel 11 Reference numeral 26 denotes the vibration direction of the trommel 10, reference numeral 30 denotes powder, and reference numerals 31 and 32 denote powder after sorting.

  The operation of this embodiment will be described with reference to FIGS.

  A powder 30 to be selected is put into the cylindrical trommel 10 as shown in FIG. The trommel 10 is arranged so as to be inclined so that the right side of FIG. The trommel 10 is rotated in the rotational direction 25 by applying a rotational driving force from the roller chain 15 to the disk 17 fixed to the right end of the trommel 10 by a driving force transmitting means described later. At the same time as the rotation, the vibration in the vibration direction 26 is also given and swings. By this rotation and swing, the powder 30 moves rightward in the trommel 10 according to the inclination while being sieved by the sieve surface 11. During this movement, the powder 31 smaller than the opening is sorted and falls below the sieve surface 11, and the powder 32 larger than the opening is discharged to the outside from a discharge port (not shown) on the right side of the sieve surface 11. Is executed.

  Next, the operation of the driving force transmission means will be described with reference to FIGS. FIG. 3 is a side view of the configuration of the driving force transmission means as viewed from the right side of FIG. FIG. 4 is an explanatory diagram showing that vibration is generated during transmission during the rotational driving force in the configuration of FIG.

  3 and 4, reference numeral 16 denotes a roller of the roller chain 15, reference numeral 18 denotes a first gear, reference numeral 19 denotes a second gear, reference numeral 20 denotes a gear tooth tip, reference numeral 21 denotes a gear tooth bottom, reference numeral 24 Is the rotation center of the sieve surface 11 of the trommel 10. Other reference numerals are the same as those in FIGS.

  In FIG. 3, the first gear 18 is rotated by driving force generating means such as a motor (not shown). When the first gear 18 rotates, the teeth of the gear 18 mesh with the roller chain 15 wound around the disk 17 to rotate the disk 17, thereby rotating the trommel 10. In this way, the rotational driving force from the driving force generating means is transmitted to the trommel 10. This rotation is transmitted to the second gear 19 via the roller chain 15, and the second gear 19 also rotates.

  Thus, in the present embodiment, the roller chain 15, the disk 17, the first gear 18, and the second gear 19 constitute driving force transmission means. This driving force transmission means supports the right side of the trommel 10 from below.

  Next, the principle of generating vibration that causes the trommel 10 to swing from the driving force transmitting means will be described.

  3 and 4, when the tooth tip 20 comes on a straight line connecting the center of the first gear 18 or the second gear 19 and the rotation center 24 of the sieve surface 11 (indicated by the solid line in the gear 18 of FIG. 4). And when the tooth bottom 21 comes on the straight line (when the gear 18 in FIG. 4 is indicated by a dotted line and when the gear 19 is indicated by a solid line). ).

  When the tooth tip 20 comes on a straight line connecting the center of the first gear 18 or the second gear 19 and the rotation center 24 of the sieve surface 11, the gap between the rollers 16 is on this straight line, and the roller chain 15 The roller 16 is pushed down by the load of the supporting trommel 10 to the position of a circle connecting the tooth bottoms 21 of the gear 18 with the first gear 18 on the right side of FIG. On the other hand, when the tooth bottom 21 comes on this straight line, as shown by a dotted line in the first gear 18 on the right side of FIG.

  Therefore, every time the gear 18 rotates by one tooth, the support point of the trommel 10 (contact point between the gear 18 and the roller chain 15) moves up and down one cycle, and the support point of the trommel 10 as the gear 18 rotates. Thus, the driving force transmission means gives the trommel 10 a rotation and a vertical vibration. The amplitude of the vertical movement of the support point at this time is indicated by G in FIG.

  By the way, in the present embodiment, in addition to the first gear 18 that transmits the rotational driving force from the driving force generating means, the roller chain 15 that is the same (the same number of teeth and the same size) as the first gear 18 is used. A second gear 19 that passively rotates in response to the movement is provided at a position symmetrical to the first gear 18 with respect to a normal passing through the rotation center 24 of the sieve surface 11. Then, when the rotation is synchronized with the first gear 18 and the tooth tip 20 comes on a straight line connecting the center of the first gear 18 and the rotation center 24 of the sieve surface 11, In the gear 19, the tooth bottom 21 is set on a straight line connecting the center thereof and the rotation center 24 of the sieve surface 11.

  In this manner, when the support point of the first gear 18 on the trommel 10 is lowered, the support point of the second gear 19 is raised, and from this movement, the disk 17 (that is, the trommel 10) is rotated clockwise in the side view of FIG. The force that rotates in the same way. On the other hand, when the support point of the trommel 10 of the first gear 18 is raised, the support point of the second gear 19 is lowered, and a force for rotating the disk 17 counterclockwise from now on acts.

  Accordingly, when the first gear 18 is rotated counterclockwise by one tooth by the driving force generating means, the disk 17, that is, the trommel 10 is rotated clockwise by that amount and, for example, the right and left, right and left rotations of one cycle. When the first gear 18 continues to rotate, the disk 17 or the trommel 10 repeats rocking as it rotates.

  As described above, in this embodiment, the driving force transmission means including the roller chain 15, the disk 17, the first gear 18, and the second gear 19 transmits the rotational driving force from the driving force generation means to the trommel 10. At the same time, vibrations that swing the trommel 10 are also transmitted, so that clogging can be eliminated and efficient sieving can be realized without using special elements or elements.

  In the present embodiment described above, the disk 17 around which the roller chain 15 is wound is provided at one end of the trommel 10 and this is driven by the first gear 18, but the gear is provided at one end of the trommel, You may make it rotate and rock | fluctuate this with the disk which wound the roller chain rotated with the rotational driving force from a driving force generation means. It is also possible to employ a gear structure that transmits a rotational driving force from a gear meshing with a gear provided at one end of the trommel. In this case, the backlash between the two gears will cause the trommel support point to move up and down.

  As described above, according to the powder sorting apparatus of the present invention, clogging can be eliminated without using extra elements or elements, and efficient sieving can be performed. Therefore, it can be widely used in a wide range of fields such as civil engineering and construction fields and material fields, and the effect is great.

It is a side view of the sieve surface of the trommel used for the powder sorter of the present invention. It is principal part sectional drawing of the powder selection apparatus of this invention. It is a side view of the driving force transmission means of the powder sorting apparatus of the present invention. It is explanatory drawing of the principle of the vibration generation of the powder selection apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Trommel 11 Sieve surface 12 Opening 14 Slot 15 Roller chain 16 Roller 17 Disk 18 1st gear 19 2nd gear 20 Gear tooth tip 21 Gear tooth bottom 24 Center of rotation of sieving surface 25 Trommel rotation direction 26 Trommel Vibration direction 30 Powder 31, 32 Powder after sorting

Claims (5)

A trommel; a driving force generating means for generating a rotational driving force for rotating the trommel; and a driving force transmitting means for connecting the driving force generating means and the trommel to transmit the rotational driving force. In the powder sorting device that sifts the object inside by rotating,
The powder sorting device according to claim 1, wherein the driving force transmitting means supports one end of the trommel in the length direction from below and applies vibration to the trommel when transmitting the driving force.   The driving force transmission means includes a disk around which a roller chain provided at one end of the trommel is wound, and a gear that engages with the roller chain. The gear rotates by the driving force of the driving force generation means. 2. The powder sorting apparatus according to claim 1, wherein the trommel is rotated and vibration is applied to the trommel.   The driving force transmitting means comprises a gear provided at one end of the trommel and a disk around which a roller chain fitted with the gear is wound, and the disk itself rotates by the driving force of the driving force generating means. The powder sorting apparatus according to claim 1, wherein the trommel is rotated and vibration is applied to the trommel.   The driving force transmission means includes a first gear provided at one end of the trommel and a second gear engaged with the first gear, and the second gear itself is the driving force generation means. The powder sorting apparatus according to claim 1, wherein the trommel is rotated by being rotated by a driving force and vibration is applied to the trommel.   The powder sorting apparatus according to any one of claims 1 to 4, wherein the rotational axis of the trommel has an inclination in a length direction with respect to a horizontal direction.

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